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poster board

American

Or posterboard

noun

a thick, fairly stiff cardboard composed of layers of paper or paper pulp compressed together and typically used to support displays.

adjective

of, relating to, or made of poster board.

Etymology

Origin of poster board

First recorded in 1900–05

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For five decades, the Ecuadorian siblings have created signs for stores using poster board and markers.

From The Wall Street Journal • Apr. 22, 2026

They simply plugged in the numbers they could easily find, fudged the rest and threw it on a poster board.

From Salon • Apr. 5, 2026

In bright red paint, a message on a poster board shone: “We love you, Beautiful Altadena.”

From Los Angeles Times • Jan. 11, 2025

In the gymnasium at Gregory Heights, third graders rode bikes from one end to the other, stopping whenever Niculita held up stop signs or a large poster board with a black car on it.

From Seattle Times • Apr. 27, 2024

Dad says he will bring home poster board today, and we’ll paint it.

From "Muffled" by Jennifer Gennari

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023